title: Pm50: a new powdery mildew resistance gene in common wheat derived from cultivated emmer.
abstract: Fungal diseases of wheat, including powdery mildew, cause significant crop, yield and quality losses throughout the world. Knowledge of the genetic basis of powdery mildew resistance will greatly support future efforts to develop and cultivate resistant cultivars. Studies were conducted on cultivated emmer-derived wheat line K2 to identify genes involved in powdery mildew resistance at the seedling and adult plant growth stages using a BC(1) doubled haploid population derived from a cross between K2 and susceptible cultivar Audace. A single gene was located distal to microsatellite marker Xgwm294 on the long arm of chromosome 2A. Quantitative trait loci (QTL) analysis indicated that the gene was also effective at the adult plant stage, explaining up to 79.0 % of the variation in the progeny. Comparison of genetic maps indicated that the resistance gene in K2 was different from Pm4, the only other formally named resistance gene located on chromosome 2AL, and PmHNK54, a gene derived from Chinese germplasm. The new gene was designated Pm50.
authors.affiliation: Institute for Crop Science and Plant Breeding, Bavarian State Research Center for Agriculture, Am Gereuth 8, 85354, Freising, Germany. volker.mohler@lfl.bayern.de
authors.forename: Volker
authors.initials: V
authors.lastname: Mohler
authors.forename: Christoph
authors.initials: C
authors.lastname: Bauer
authors.forename: Günther
authors.initials: G
authors.lastname: Schweizer
authors.forename: Hubert
authors.initials: H
authors.lastname: Kempf
authors.forename: Lorenz
authors.initials: L
authors.lastname: Hartl
mesh_terms: D001203:Ascomycota; D002874:Chromosome Mapping / Q000379:methods; D032461:Chromosomes, Plant; D003433:Crosses, Genetic; D060467:Disease Resistance / Q000235:genetics*; D017353:Gene Deletion; D017343:Genes, Plant; D008040:Genetic Linkage; D005819:Genetic Markers; D006238:Haploidy; D018895:Microsatellite Repeats / Q000235:genetics; D010935:Plant Diseases / Q000235:genetics* / Q000276:immunology; D040641:Quantitative Trait Loci / Q000235:genetics; D014908:Triticum / Q000235:genetics* / Q000276:immunology*
chemical_list: D005819:Genetic Markers